Identification and Localization of Carbonic Anhydrase in Two Chlorella Species
Author(s) -
John R. Coleman,
Cathy Rotatore,
T. G. Williams,
Brian Colman
Publication year - 1991
Publication title -
plant physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.554
H-Index - 312
eISSN - 1532-2548
pISSN - 0032-0889
DOI - 10.1104/pp.95.1.331
Subject(s) - carbonic anhydrase , extracellular , biochemistry , polyclonal antibodies , chlorella , kilodalton , biology , chlamydomonas , cytosol , chloroplast , enzyme , molecular mass , chemistry , algae , antibody , botany , mutant , gene , immunology
Carbonic anhydrase (CA) activity and localization have been examined in two species of the eukaryotic green alga Chlorella. Mass spectrometric and potentiometric assays of CA activity indicate that C. ellipsoidea contains very little extracellular CA activity whereas C. saccharophila exhibits significant extracellular activity when grown at alkaline pH values. Extracellular CA activity appears to be correlated with the presence of a 36 kilodalton polypeptide that was detected immunologically using a polyclonal antibody directed against the 37 kilodalton Chlamydomonas CA monomer. Both Chlorella species and enzymatically isolated C. ellipsoidea chloroplasts also contain an immunologically similar 38 kilodalton polypeptide that may be a cytosolic or chloroplastic form of CA.
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